Edit report at https://bugs.php.net/bug.php?id=52412&edit=1
ID: 52412
Comment by: rahuijts at tiscali dot nl
Reported by: madboyka at yahoo dot com
Summary: __autoload fails to throw exception when calling a
static method on the class
Status: Not a bug
Type: Bug
Package: Scripting Engine problem
Operating System: *
PHP Version: 5.3.3
Block user comment: N
Private report: N
New Comment:
Please
- explain (and let the documentation show) why it is not possible to throw an exception in the
__autoload function if a static call is made on a non-existing class, when it is possible to do so
if a non-existing class is instantiated,
- or reopen this bug report to acknowledge that it should be possible in both cases but currently
fails for static calls due to a bug in PHP.
The documentation indeed supports the case for this bug report, but to defend derick@php.net as
well: the first part of his response is probably a template text when marking a report as "Not
a bug". The rest of his message does not mention static calling, which is essential for the
problem to occur, so I think he closed the report because he missed that point. Please let us know,
because the current status is very confusing.
Previous Comments:
------------------------------------------------------------------------
[2011-02-21 19:35:10] php dot net at phrozenbyte dot de
I support this re-opening-request... Since 5.3 __autoload() is definitly *not* "the last line
of defense for PHP to find a class definition". That's simply wrong.
http://www.php.net/manual/en/language.oop5.autoload.php
(Note #1 + Example #3)
http://www.php.net/manual/en/language.oop5.changelog.php
(#5)
------------------------------------------------------------------------
[2011-02-19 23:06:12] michael at squiloople dot com
Here's a request to re-open the bug, for it is indeed a bug: exceptions can be
thrown and caught if the method called is _not_ static, as documented, but cannot
be thrown and caught if the method _is_ static (and where the class name is not a
variable), which is both inconsistent and against the documentation. It is
_unexpected_ behaviour.
------------------------------------------------------------------------
[2011-02-16 15:31:49] madboyka at yahoo dot com
To: derick@php.net
I don't think you've read the documentation on autoloading yourself:
http://www.php.net/manual/en/language.oop5.autoload.php
The first note states that since PHP 5.3, you may throw an exception from the autoload function
(even if the class can be loaded) and catch that exception without a problem. Examples #3 and #4 in
the documentation entry demonstrate this. This works when the autoload function gets invoked when
instantiating a class, but doesn't when you make a static call on it. This behavior is not
consistent.
Also, take a look at michael@...'s workaround, which unexpectedly works great. And don't
tell me that PHP behaves as "expected".
I understand, that this is not a major bug, we all can live without a fix, but at least mark it as
to be fixed in the far future.
------------------------------------------------------------------------
[2011-02-16 11:24:38] derick@php.net
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php
FWIW, this is "expected". The __autoload() method is the last line of defense for PHP to
find a class definition. If it can't find it, PHP bails out with a fatal error. If you throw an
exception, you basically abort this final chance, and thus gives PHP you that fatal "can not
find class" error. However, you can catch the exception in the __autoload() method,
------------------------------------------------------------------------
[2011-02-16 08:05:14] michael at squiloople dot com
There's a slight hack of a solution tested using PHP 5.3.5 and Windows Vista:
use a variable as the class name:
function __autoload($class)
{
if (!include $class . '.php')
{
throw new Exception('Cannot autoload ' . $class);
}
}
$class = 'Application';
try
{
$class::start();
}
catch (Exception $e)
{
echo $e->getMessage();
}
// Outputs the exception as expected.
------------------------------------------------------------------------
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the rest of the comments, please view the bug report online at
https://bugs.php.net/bug.php?id=52412
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